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Journal articles on the topic 'Subwavelength grating metamaterials'

Author: Grafiati

Published: 30 November 2024

Last updated: 19 July 2025

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1

Luque-González, José Manuel, Alejandro Sánchez-Postigo, Abdelfettah Hadij-ElHouati, et al. "A review of silicon subwavelength gratings: building break-through devices with anisotropic metamaterials." Nanophotonics 10, no. 11 (2021): 2765–97. http://dx.doi.org/10.1515/nanoph-2021-0110.

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Abstract Silicon photonics is playing a key role in areas as diverse as high-speed optical communications, neural networks, supercomputing, quantum photonics, and sensing, which demand the development of highly efficient and compact light-processing devices. The lithographic segmentation of silicon waveguides at the subwavelength scale enables the synthesis of artificial materials that significantly expand the design space in silicon photonics. The optical properties of these metamaterials can be controlled by a judicious design of the subwavelength grating geometry, enhancing the performance

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2

Sánchez-Postigo, Alejandro, Pablo Ginel-Moreno, Alejandro Ortega-Moñux, et al. "Building high-performance integrated optical devices using subwavelength grating metamaterials -INVITED." EPJ Web of Conferences 255 (2021): 01001. http://dx.doi.org/10.1051/epjconf/202125501001.

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The use of subwavelength grating structures in silicon waveguides have fuelled the development of integrated optical components with superior performance. By a judicious lithographic patterning of the grating, the optical properties of the synthesized metamaterial can be accurately tailored. In this work, we review our latest advances in subwavelength-grating-engineered silicon and germanium planar devices.

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3

Parra, Jorge. "Polarization-Insensitive Silicon Grating Couplers via Subwavelength Metamaterials and Metaheuristic Optimization." Photonics 12, no. 5 (2025): 428. https://doi.org/10.3390/photonics12050428.

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Silicon photonics is the leading platform in photonic integrated circuits (PICs), enabling dense integration and low-cost manufacturing for applications such as data communications, artificial intelligence, and quantum processing, to name a few. However, efficient and polarization-insensitive fiber-to-PIC coupling for multipoint wafer characterization remains a challenge due to the birefringence of silicon waveguides. Here, we address this issue by proposing polarization-insensitive grating couplers based on subwavelength dielectric metamaterials and metaheuristic optimization. Subwavelength p

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Pérez-Armenta, Carlos, Alejandro Ortega-Moñux, José Manuel Luque-González, et al. "Polarization independent 2×2 multimode interference coupler with bricked subwavelength metamaterial." EPJ Web of Conferences 266 (2022): 01009. http://dx.doi.org/10.1051/epjconf/202226601009.

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The silicon-on-insulator (SOI) platform enables high integration density in photonic integrated circuits while maintaining compatibility with CMOS fabrication processes. Nevertheless, its inherently high modal birefringence hinders the development of polarization-insensitive devices. The dispersion and anisotropy engineering leveraging subwavelength grating (SWG) metamaterials makes possible the development of polarization agnostic waveguide components. In this work we build upon the bricked SWG metamaterial nanostructures to design a polarization independent 2×2 multimode interference (MMI) c

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Kameshkov, Oleg, Vasily Gerasimov, and Boris Knyazev. "Numerical Optimization of Refractive Index Sensors Based on Diffraction Gratings with High Aspect Ratio in Terahertz Range." Sensors 22, no. 1 (2021): 172. http://dx.doi.org/10.3390/s22010172.

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Terahertz surface plasmon resonance (SPR) sensors have been regarded as a promising technology in biomedicine due to their real-time, label-free, and ultrasensitive monitoring features. Different authors have suggested a lot of SPR sensors, including those based on 2D and 3D metamaterials, subwavelength gratings, graphene, and graphene nanotube, as well as others. However, one of the traditional approaches to realize high sensitivity SPR sensors based on metal diffraction gratings has been studied poorly in the terahertz frequency range. In this article, a linear metal rectangular diffraction

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6

Vakarin, Vladyslav, Daniele Melati, Thi Thuy Duong Dinh, et al. "Metamaterial-Engineered Silicon Beam Splitter Fabricated with Deep UV Immersion Lithography." Nanomaterials 11, no. 11 (2021): 2949. http://dx.doi.org/10.3390/nano11112949.

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Subwavelength grating (SWG) metamaterials have garnered a great interest for their singular capability to shape the material properties and the propagation of light, allowing the realization of devices with unprecedented performance. However, practical SWG implementations are limited by fabrication constraints, such as minimum feature size, that restrict the available design space or compromise compatibility with high-volume fabrication technologies. Indeed, most successful SWG realizations so far relied on electron-beam lithographic techniques, compromising the scalability of the approach. He

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Fraser, William, Radovan Korček, Ivan Glesk, et al. "High-Efficiency Metamaterial-Engineered Grating Couplers for Silicon Nitride Photonics." Nanomaterials 14, no. 7 (2024): 581. http://dx.doi.org/10.3390/nano14070581.

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Silicon nitride (Si3N4) is an ideal candidate for the development of low-loss photonic integrated circuits. However, efficient light coupling between standard optical fibers and Si3N4 chips remains a significant challenge. For vertical grating couplers, the lower index contrast yields a weak grating strength, which translates to long diffractive structures, limiting the coupling performance. In response to the rise of hybrid photonic platforms, the adoption of multi-layer grating arrangements has emerged as a promising strategy to enhance the performance of Si3N4 couplers. In this work, we pre

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8

Luque‐González, José Manuel, Robert Halir, Juan Gonzalo Wangüemert‐Pérez, et al. "An Ultracompact GRIN‐Lens‐Based Spot Size Converter using Subwavelength Grating Metamaterials." Laser & Photonics Reviews 13, no. 11 (2019): 1900172. http://dx.doi.org/10.1002/lpor.201900172.

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9

Benedikovic, Daniel, Carlos Alonso-Ramos, Sylvain Guerber, et al. "Sub-decibel silicon grating couplers based on L-shaped waveguides and engineered subwavelength metamaterials." Optics Express 27, no. 18 (2019): 26239. http://dx.doi.org/10.1364/oe.27.026239.

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10

González, Andrade David, Irene Olivares, de Cabo Raque Fernández, Jaime Vilas, Antonio Dias, and Velasco Aitor V. "Broadband three-mode converter and multiplexer based on cascaded symmetric Y-junctions and subwavelength engineered MMI and phase shifters." Optics and Laser Technology 164, no. 109513 (2023): 1–8. https://doi.org/10.1016/j.optlastec.2023.109513.

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Mode-division multiplexing has emerged as a promising route for increasing transmission capacity while maintaining the same level of on-chip integration. Despite the large number of on-chip mode converters and multiplexers reported for the silicon-on-insulator platform, scaling the number of multiplexed modes is still a critical challenge. In this paper, we present a novel three-mode architecture based on multimode interference couplers, passive phase shifters and cascaded symmetric Y-junctions. This architecture can readily operate up to the third-order mode by including a single switchable p

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11

Badri, S. Hadi, and M. M. Gilarlue. "Silicon nitride waveguide devices based on gradient-index lenses implemented by subwavelength silicon grating metamaterials." Applied Optics 59, no. 17 (2020): 5269. http://dx.doi.org/10.1364/ao.393501.

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12

Chang, Ruei-Jan, and Chia-Chien Huang. "Simulation of a High-Performance Polarization Beam Splitter Assisted by Two-Dimensional Metamaterials." Nanomaterials 12, no. 11 (2022): 1852. http://dx.doi.org/10.3390/nano12111852.

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It is challenging to simultaneously consider device dimension, polarization extinction ratio (PER), insertion loss (IL), and operable bandwidth (BW) to design a polarization beam splitter (PBS) that is extensively used in photonic integrated circuits. The function of a PBS is to separate polarizations of light, doubling the transmission bandwidth in optical communication systems. In this work, we report a high-performance PBS comprising two-dimensional subwavelength grating metamaterials (2D SWGMs) between slot waveguides. The 2D SWGMs exhibited biaxial permittivity by tailoring the material a

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13

Sun, Lu, Yong Zhang, Yu He, Hongwei Wang, and Yikai Su. "Subwavelength structured silicon waveguides and photonic devices." Nanophotonics 9, no. 6 (2020): 1321–40. http://dx.doi.org/10.1515/nanoph-2020-0070.

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AbstractSubwavelength structures such as subwavelength gratings (SWGs) and subwavelength metamaterials are capable of tailoring the optical properties of materials and controlling the flow of light at the nanoscale. The effective indices of the subwavelength structured strip and slab waveguides can be changed in a wide range by choosing an appropriate duty cycle or a filling factor of silicon, which provides an effective method to manipulate the optical field and achieve effective index matching for functional devices. Recent advances in nanofabrication techniques have made it possible to impl

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14

Kanamori, Yoshiaki, Daisuke Ema, and Kazuhiro Hane. "Miniature Spectroscopes with Two-Dimensional Guided-Mode Resonant Metal Grating Filters Integrated on a Photodiode Array." Materials 11, no. 10 (2018): 1924. http://dx.doi.org/10.3390/ma11101924.

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A small spectroscope with 25 color sensors was fabricated by combining metamaterial color filters and Si photodiodes. The metamaterial color filters consisted of guided-mode resonant metal gratings with subwavelength two-dimensional periodic structures. Transmittance characteristics of the color filters were designed to obtain peak wavelengths proportional to grating periods. For each color sensor, a peak wavelength of the spectral sensitivity could be tuned in the range of visible wavelengths by adjusting each grating period. By performing spectrum reconstruction using Tikhonov regularization

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15

Wu, Tiesheng, Xin Cheng, Yujing Lan, et al. "Numerical Study of Optical Nonreciprocal Transmission via Liquid Metamaterial Nonlinearity." Materials 18, no. 10 (2025): 2241. https://doi.org/10.3390/ma18102241.

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This study proposes and numerically demonstrates a novel nonreciprocal electromagnetic metasurface by integrating a highly nonlinear liquid metamaterial (LMM) with a simple two-dimensional silicon dielectric grating. The transmission characteristics of the proposed structure were investigated using a full-vector finite-element method. We demonstrated that the proposed subwavelength-thickness metasurface achieves a transmission coefficient contrast of up to 0.96 between forward and backward propagation. Highly nonlinear LMMs, when employed as nonreciprocal media, significantly lower the radiati

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16

Ortega-Moñux, Alejandro, Jiří Čtyroký, Pavel Cheben, et al. "Disorder effects in subwavelength grating metamaterial waveguides." Optics Express 25, no. 11 (2017): 12222. http://dx.doi.org/10.1364/oe.25.012222.

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17

Halir, Robert, Alejandro Ortega-Monux, Daniel Benedikovic, et al. "Subwavelength-Grating Metamaterial Structures for Silicon Photonic Devices." Proceedings of the IEEE 106, no. 12 (2018): 2144–57. http://dx.doi.org/10.1109/jproc.2018.2851614.

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18

Sarmiento-Merenguel, J. Darío, Alejandro Ortega-Moñux, Jean-Marc Fédéli, et al. "Controlling leakage losses in subwavelength grating silicon metamaterial waveguides." Optics Letters 41, no. 15 (2016): 3443. http://dx.doi.org/10.1364/ol.41.003443.

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19

Cheben, Pavel, Jiří Čtyroký, Jens H. Schmid, et al. "Bragg filter bandwidth engineering in subwavelength grating metamaterial waveguides." Optics Letters 44, no. 4 (2019): 1043. http://dx.doi.org/10.1364/ol.44.001043.

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20

Naraine, Cameron M., Jeremy W. Miller, Henry C. Frankis, et al. "Subwavelength grating metamaterial waveguides functionalized with tellurium oxide cladding." Optics Express 28, no. 12 (2020): 18538. http://dx.doi.org/10.1364/oe.393729.

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21

Xu, Xiaochuan, Zeyu Pan, Chi-Jui Chung, Ching-Wen Chang, Hai Yan, and Ray T. Chen. "Subwavelength Grating Metamaterial Racetrack Resonator for Sensing and Modulation." IEEE Journal of Selected Topics in Quantum Electronics 25, no. 3 (2019): 1–8. http://dx.doi.org/10.1109/jstqe.2019.2915980.

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22

Shin, Yosep, Kyungtae Kim, Jaewhan Lee, Saman Jahani, Zubin Jacob, and Sangsik Kim. "Anisotropic metamaterials for scalable photonic integrated circuits: a review on subwavelength gratings for high-density integration." Nanophotonics 14, no. 9 (2025): 1311–31. https://doi.org/10.1515/nanoph-2024-0627.

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Abstract Photonic integrated circuits (PICs) are transforming optical technology by miniaturizing complex photonic elements and systems onto single chips. However, scaling PICs to higher densities is constrained by optical crosstalk and device separation requirements, limiting both performance and size. Recent advancements in anisotropic metamaterials, particularly subwavelength gratings (SWGs), address these challenges by providing unprecedented control over evanescent fields and anisotropic perturbations in PICs. Here we review the role of anisotropic SWG metamaterials in enhancing integrati

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23

Kim, Wonkyu, Junpeng Guo, and Joshua Hendrickson. "Subwavelength metal grating metamaterial for polarization-selective optical antireflection coating." Journal of the Optical Society of America B 32, no. 7 (2015): 1392. http://dx.doi.org/10.1364/josab.32.001392.

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24

Luque‐González, José Manuel, Alejandro Ortega‐Moñux, Robert Halir, et al. "Bricked Subwavelength Gratings: A Tailorable On‐Chip Metamaterial Topology." Laser & Photonics Reviews 15, no. 6 (2021): 2000478. http://dx.doi.org/10.1002/lpor.202000478.

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25

Luque-González, José Manuel, Alaine Herrero-Bermello, Alejandro Ortega-Moñux, et al. "Tilted subwavelength gratings: controlling anisotropy in metamaterial nanophotonic waveguides." Optics Letters 43, no. 19 (2018): 4691. http://dx.doi.org/10.1364/ol.43.004691.

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26

Mohammadi Estakhri, Nasim, Christos Argyropoulos, and Andrea Alù. "Graded metascreens to enable a new degree of nanoscale light management." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 373, no. 2049 (2015): 20140351. http://dx.doi.org/10.1098/rsta.2014.0351.

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Optical metasurfaces, typically referred to as two-dimensional metamaterials, are arrays of engineered subwavelength inclusions suitably designed to tailor the light properties, including amplitude, phase and polarization state, over deeply subwavelength scales. By exploiting anomalous localized interactions of surface elements with optical waves, metasurfaces can go beyond the functionalities offered by conventional diffractive optical gratings. The innate simplicity of implementation and the distinct underlying physics of their wave–matter interaction distinguish metasurfaces from three-dime

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27

Čtyroký, Jiří, Juan Gonzalo Wangüemert-Pérez, Pavel Kwiecien, et al. "Design of narrowband Bragg spectral filters in subwavelength grating metamaterial waveguides." Optics Express 26, no. 1 (2018): 179. http://dx.doi.org/10.1364/oe.26.000179.

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28

Penades, J. Soler, A. Ortega-Moñux, M. Nedeljkovic, et al. "Suspended silicon mid-infrared waveguide devices with subwavelength grating metamaterial cladding." Optics Express 24, no. 20 (2016): 22908. http://dx.doi.org/10.1364/oe.24.022908.

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29

Butt, Muhammad Ali. "Numerical investigation of a small footprint plasmonic Bragg grating structure with a high extinction ratio." Photonics Letters of Poland 12, no. 3 (2020): 82. http://dx.doi.org/10.4302/plp.v12i3.1042.

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In this paper, miniaturized design of a plasmonic Bragg grating filter is investigated via the finite element method (FEM). The filter is based on a plasmonic metal-insulator-metal waveguide deposited on a quartz substrate. The corrugated Bragg grating designed for near-infrared wavelength range is structured on both sides of the waveguide. The spectral characteristics of the filter are studied by varying the geometric parameters of the filter design. As a result, the maximum ER and bandwidth of 36.2 dB and 173 nm is obtained at λBragg=976 nm with a filter footprint of as small as 1.0 x 8.75 µ

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30

Huang, Laixin, Fei Li, Feiyan Cai, et al. "Phononic crystal-induced standing Lamb wave for the translation of subwavelength microparticles." Applied Physics Letters 121, no. 2 (2022): 023505. http://dx.doi.org/10.1063/5.0098468.

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Phononic crystals (PCs) can modulate an incident acoustic wave to provide subwavelength microparticles with stable and flexible manipulation. However, fixed artificial structures of the PCs usually result in a steady acoustic field profile, thus limiting the dynamic manipulation of microparticles. This study proposes the construction of a phononic crystal plate (PCP) using a pair of periodic oppositely arranged gratings on a plate. Under the PCP's resonance frequency, a pair of nonleaky A0 mode traveling Lamb waves that intrinsically exist in a thin plate were excited and propagated. The pair

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31

Sánchez-Postigo, Alejandro, Alejandro Ortega-Moñux, Jordi Soler Penadés, et al. "Suspended germanium waveguides with subwavelength-grating metamaterial cladding for the mid-infrared band." Optics Express 29, no. 11 (2021): 16867. http://dx.doi.org/10.1364/oe.422764.

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32

Chang, Ching-Wen, Xiaochuan Xu, Swapnajit Chakravarty, et al. "Pedestal subwavelength grating metamaterial waveguide ring resonator for ultra-sensitive label-free biosensing." Biosensors and Bioelectronics 141 (September 2019): 111396. http://dx.doi.org/10.1016/j.bios.2019.111396.

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33

Lourenço, Paulo, Alessandro Fantoni, João Costa, Miguel Fernandes, and Manuela Vieira. "Subwavelength structures for taper waveguides." Journal of Physics: Conference Series 2407, no. 1 (2022): 012040. http://dx.doi.org/10.1088/1742-6596/2407/1/012040.

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Abstract In Photonic Integrated Circuits (PICs) it is often necessary some sort of mismatch adaptation between waveguides of different cross-sections. There are several instances of such a designing constraint, being the vertical coupling between the PIC and an optical fibre probably the most representative of all examples. Here, the beam of electromagnetic energy inside the PIC must be inserted/extracted through/to an optical fibre. Typical core diameters are approximately 10 μm and 5 μm, for single mode optical fibres operating in the near infrared and visible wavelengths, respectively. On t

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34

Liu, Jia-Min, and De-Long Zhang. "Ultra-broadband thin-film lithium niobate TM-pass waveguide polarizer using subwavelength grating metamaterial." Optics & Laser Technology 164 (September 2023): 109556. http://dx.doi.org/10.1016/j.optlastec.2023.109556.

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35

Zhang, Zecen, Jin Zhou, Callum G. Littlejohns, et al. "Mid-Infrared Sensor Based on a Suspended Microracetrack Resonator With Lateral Subwavelength-Grating Metamaterial Cladding." IEEE Photonics Journal 10, no. 2 (2018): 1–8. http://dx.doi.org/10.1109/jphot.2018.2809662.

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36

Zhang, Chi, Qiang Liu, Xiao Peng, Zhengbiao Ouyang, and Suling Shen. "Sensitive THz sensing based on Fano resonance in all-polymeric Bloch surface wave structure." Nanophotonics 10, no. 15 (2021): 3879–88. http://dx.doi.org/10.1515/nanoph-2021-0339.

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Abstract Simultaneous realization of high quality factor (Q), sensitivity, and figure of merit (FOM) play a pivotal role in building the THz sensor. For such purpose, we propose an all-polymeric Bloch surface wave (BSW) structure that supports a bright BSW mode and a dark surface Fano state that is embedded in the continuum, both of which coupled to the same radiation channels. The existence of the sharp dip with a maximum depth of Fano line could be interpreted with the physics of Friedrich–Wintgen bound states in the continuum (FW-BICs), because of the destructive interference between bright

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37

Zhu, Danfeng, Han Ye, Yumin Liu, Jing Li, and Zhongyuan Yu. "High-Contrast and Compact Integrated Wavelength Diplexer Based on Subwavelength Grating Anisotropic Metamaterial for 1550/2000 nm." IEEE Photonics Journal 13, no. 2 (2021): 1–10. http://dx.doi.org/10.1109/jphot.2021.3061966.

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Iftimie, Nicoleta, Rozina Steigmann, Dagmar Faktorova, and Adriana Savin. "Metallic Structures Based on Zinc Oxide Film for Enzyme Biorecognition." Micromachines 13, no. 11 (2022): 1997. http://dx.doi.org/10.3390/mi13111997.

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Two structures (Ag/ZnO/ITI/glass: #1 sample and Ag/ZnO/SiO2/Si: #2 sample) are investigated, on the one hand, from the point of view of the formation of evanescent waves in the gratings of metal strips on the structures when the incident TEz wave in the radio frequency range is used. The simulation of the formation of evanescent waves at the edge of the Ag strips, with thicknesses in the range of micrometers, was carried out before the test in the subwavelength regime, with the help of a new improved transducer with metamaterial (MM) lenses. By simulation, a field snapshot was obtained in each

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Butt, Muhammad Ali, and Nikolai Lvovich Kazansky. "SOI Suspended membrane waveguide at 3.39 µm for gas sensing application." Photonics Letters of Poland 12, no. 2 (2020): 67. http://dx.doi.org/10.4302/plp.v12i2.1034.

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In this letter, we present a numerical study on the designing of silicon-on-insulator (SOI) suspended membrane waveguide (SMW). The waveguide geometry is optimized at 3.39 µm TE-polarized light which is the absorption line of methane gas by utilizing a 3D finite element method (FEM). The transmission loss (TL) and evanescent field ratio (EFR) of the waveguide are calculated for different geometric parameters such as the width of core, the height of core and period of the cladding. We found out that TL is directly related to EFR. Therefore, a waveguide geometry can be designed which can offer h

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Mia, Md Borhan, Nafiz Jaidye, Ishtiaque Ahmed, Syed Ziauddin Ahmed, and Sangsik Kim. "Broadband integrated polarization splitter and rotator using subwavelength grating metamaterials." Optics Express, January 4, 2023. http://dx.doi.org/10.1364/oe.479195.

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Fernández de Cabo, Raquel, Alejandro Sánchez-Sánchez, Yijun Yang, et al. "Broadband mode exchanger based on subwavelength Y-junctions." Nanophotonics, August 7, 2024. http://dx.doi.org/10.1515/nanoph-2024-0291.

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Abstract Multimode silicon photonics, leveraging mode-division multiplexing technologies, offers significant potential to increase capacity of large-scale multiprocessing systems for on-chip optical interconnects. These technologies have implications not only for telecom and datacom applications, but also for cutting-edge fields such as quantum and nonlinear photonics. Thus, the development of compact, low-loss and low-crosstalk multimode devices, in particular mode exchangers, is crucial for effective on-chip mode manipulation. This work introduces a novel mode exchanger that exploits the pro

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42

Huang, Chia-Chih. "Dual subwavelength-grating topology for building polarization beam splitters." Journal of Physics: Photonics, January 14, 2025. https://doi.org/10.1088/2515-7647/adaa41.

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Abstract A polarization beam splitter (PBS) is key for building polarization-diversity systems in optical communication networks. Here, we propose a compact and easy-to-fabricate PBS based on a dual subwavelength-grating (DSWG) structure positioned between two Si waveguides on a silicon-on-insulator platform. The coupling strengths of the transverse-electric (TE) and transverse-magnetic (TM) modes were selectively modified, with TE mode suppression and TM mode enhancement. By optimizing the duty cycles along transverse and longitudinal directions of the DSWG structure, the device length is red

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43

Guo, Zhenzhao, Shengbao Wu, Yunfeng Lai, and Shuying Cheng. "Ultracompact and Polarization-Independent On-Chip Mode Exchangers Enabled by Subwavelength Grating Metamaterials." Journal of Lightwave Technology, 2024, 1–8. http://dx.doi.org/10.1109/jlt.2024.3451234.

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44

Kabir, Md Faiyaz, Md Borhan Mia, Ishtiaque Ahmed, Nafiz Jaidye, Syed Z. Ahmed, and Sangsik Kim. "Anisotropic leaky-like perturbation with subwavelength gratings enables zero crosstalk." Light: Science & Applications 12, no. 1 (2023). http://dx.doi.org/10.1038/s41377-023-01184-5.

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AbstractElectromagnetic coupling via an evanescent field or radiative wave is a primary characteristic of light, allowing optical signal/power transfer in a photonic circuit but limiting integration density. A leaky mode, which combines both evanescent field and radiative wave, causes stronger coupling and is thus considered not ideal for dense integration. Here we show that a leaky oscillation with anisotropic perturbation rather can achieve completely zero crosstalk realized by subwavelength grating (SWG) metamaterials. The oscillating fields in the SWGs enable coupling coefficients in each

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Guo, Zhenzhao, Jinbiao Xiao, and Shengbao Wu. "Experimental demonstration of flexible and high-performance mode-order converter using subwavelength grating metamaterials." Optics Express, March 2, 2023. http://dx.doi.org/10.1364/oe.484384.

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46

Yu, Qianli, Zhenzhao Guo, Jiabao Zhu, et al. "Ultra-compact and polarization-insensitive silicon waveguide 3×3 star-crossing based on composite subwavelength grating metamaterials." Optics Letters, July 15, 2024. http://dx.doi.org/10.1364/ol.529947.

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47

Li, Wanxin, Jiewen Li, Lin Yu, et al. "Observation of Aulter-Townes Splitting in Subwavelength Grating Metamaterial Ring Resonators." APL Photonics, December 8, 2022. http://dx.doi.org/10.1063/5.0122472.

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Subwavelength grating metamaterial (SGM) waveguide is typically treated as a homogeneous medium without considering the intra-waveguide reflection. However, this approximation is not always valid, especially in resonators. Inthis paper, we show that the reflection induced mutual coupling between the clock-wise (CW) and counter clock- wise(CCW) resonant modes in subwavelength grating metamaterial waveguide ring resonator (SGMRR) breaks the degeneracy of the two modes, leading to the formation of Autler-Townes splitting (ATS). This phenomenon could beleveraged to improve the detection limit of S

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Fraser, William, Daniel Benedikovic, Radovan Korcek, et al. "High-efficiency self-focusing metamaterial grating coupler in silicon nitride with amorphous silicon overlay." Scientific Reports 14, no. 1 (2024). http://dx.doi.org/10.1038/s41598-024-62336-0.

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AbstractEfficient fiber-chip coupling interfaces are critically important for integrated photonics. Since surface gratings diffract optical signals vertically out of the chip, these couplers can be placed anywhere in the circuit allowing for wafer-scale testing. While state-of-the-art grating couplers have been developed for silicon-on-insulator (SOI) waveguides, the moderate index contrast of silicon nitride (SiN) presents an outstanding challenge for implementing efficient surface grating couplers on this platform. Due to the reduced grating strength, a longer structure is required to radiat

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MacKay, Kevan K., Shurui Wang, Pavel Cheben, and Winnie N. Ye. "Subwavelength Grating Metamaterial Multimode Bend for Silicon Waveguides." Advanced Materials Technologies, March 25, 2022, 2200038. http://dx.doi.org/10.1002/admt.202200038.

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Jen, Yi-Jun, Po-Chun Lin, and Xing-Hao Lo. "Silver split nano-tube array as a meta-atomic monolayer for high-reflection band." Scientific Reports 12, no. 1 (2022). http://dx.doi.org/10.1038/s41598-022-17703-0.

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AbstractIn this work, an ultra-thin silver film-coated grating as a split silver nanotube array exhibits not only high TE polarized reflectance as a conventional subwavelength grating but also high TM polarized reflectance that is close to or higher than TE reflectance at certain wavelength range. The TM reflectance peak shifts with the morphology of the silver covering. The near-field analysis reveals that the silver nanotube array is an ultra-thin optical double negative metamaterial. The negative permeability associated magnetic field reversal is induced within the grating that is surrounde

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